docs: def storage_get(attribute=None, storage_id=None):
      """Get storage attributes"""
      _args = ['storage-get', '--format=json']
      if storage_id:
          _args.extend(('-s', storage_id))
      if attribute:
          _args.append(attribute)
      try:
          return json.loads(subprocess.check_output(_args).decode('UTF-8'))
      except ValueError:
          return None